///\todo upgrade

//////////////////////////////////////////////////////////////////////////////////
//                                                                              //
//  This file is part of the buola project (https://code.google.com/p/buola/).  //
//                                                                              //
//  Copyright(c) 2007-2012 Xavi Gratal                                          //
//  gratal AT gmail DOT com                                                     //
//                                                                              //
//  Buola is free software: you can redistribute it and/or modify               //
//  it under the terms of the GNU General Public License as published by        //
//  the Free Software Foundation, either version 3 of the License, or           //
//  (at your option) any later version.                                         //
//                                                                              //
//  Buola is distributed in the hope that it will be useful,                    //
//  but WITHOUT ANY WARRANTY; without even the implied warranty of              //
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               //
//  GNU General Public License for more details.                                //
//                                                                              //
//  You should have received a copy of the GNU General Public License           //
//  along with buola.  If not, see <http://www.gnu.org/licenses/>.              //
//                                                                              //
//////////////////////////////////////////////////////////////////////////////////

#ifndef __BUOLA_OS_CSIGNALBLOCKER_H__
#define __BUOLA_OS_CSIGNALBLOCKER_H__

#include <buola/buola.h>

#include <pthread.h>
#include <signal.h>

#pragma GCC diagnostic ignored "-Wunused-value"

namespace buola { namespace os {
    
///\addtogroup os
///@{

////////////////////////////////////////////////////////////////////////////

/// blocks a set of signals

/// Upon construction, blocks the given list of signals. They are unblocked again
/// in the destructor
///
////////////////////////////////////////////////////////////////////////////

class CSignalBlocker : public UUncopiable
{
public:
    ///blocks the given list of signals
    template<typename... tType>
    CSignalBlocker(tType... pSignals)
    {
        sigemptyset(&mSet);
        sigemptyset(&mOld);
        Add(pSignals...);
        pthread_sigmask(SIG_BLOCK,&mSet,&mOld);
    }

    ///unblocks the signals
    ~CSignalBlocker()
    {
        pthread_sigmask(SIG_SETMASK,&mOld,nullptr);
    }
    
private:
    void Add()
    {}
    
    template<typename... tType>
    void Add(int pSignal,tType... pRest)
    {
        sigaddset(&mSet,pSignal);
        Add(pRest...);
    }
    
    sigset_t mSet,mOld;
};

///@}

/*namespace os*/ } /*namespace buola*/ }

#endif
